#ifndef _LINUX_DN_H
#define _LINUX_DN_H

#include <linux/types.h>

/*

	DECnet Data Structures and Constants

*/

/* 
 * DNPROTO_NSP can't be the same as SOL_SOCKET, 
 * so increment each by one (compared to ULTRIX)
 */
#define DNPROTO_NSP     2	/* NSP protocol number       */
#define DNPROTO_ROU     3	/* Routing protocol number   */
#define DNPROTO_NML     4	/* Net mgt protocol number   */
#define DNPROTO_EVL     5	/* Evl protocol number (usr) */
#define DNPROTO_EVR     6	/* Evl protocol number (evl) */
#define DNPROTO_NSPT    7	/* NSP trace protocol number */

#define DN_ADDL		2
#define DN_MAXADDL	2	/* ULTRIX headers have 20 here, but pathworks has 2 */
#define DN_MAXOPTL	16
#define DN_MAXOBJL	16
#define DN_MAXACCL	40
#define DN_MAXALIASL	128
#define DN_MAXNODEL	256
#define DNBUFSIZE	65023

/* 
 * SET/GET Socket options  - must match the DSO_ numbers below
 */
#define SO_CONDATA      1
#define SO_CONACCESS    2
#define SO_PROXYUSR     3
#define SO_LINKINFO     7

#define DSO_CONDATA     1	/* Set/Get connect data                */
#define DSO_DISDATA     10	/* Set/Get disconnect data             */
#define DSO_CONACCESS   2	/* Set/Get connect access data         */
#define DSO_ACCEPTMODE  4	/* Set/Get accept mode                 */
#define DSO_CONACCEPT   5	/* Accept deferred connection          */
#define DSO_CONREJECT   6	/* Reject deferred connection          */
#define DSO_LINKINFO    7	/* Set/Get link information            */
#define DSO_STREAM      8	/* Set socket type to stream           */
#define DSO_SEQPACKET   9	/* Set socket type to sequenced packet */
#define DSO_MAXWINDOW   11	/* Maximum window size allowed         */
#define DSO_NODELAY	12	/* Turn off nagle                      */
#define DSO_CORK        13	/* Wait for more data!                 */
#define DSO_SERVICES	14	/* NSP Services field                  */
#define DSO_INFO	15	/* NSP Info field                      */
#define DSO_MAX         15	/* Maximum option number               */

/* LINK States */
#define LL_INACTIVE	0
#define LL_CONNECTING	1
#define LL_RUNNING	2
#define LL_DISCONNECTING 3

#define ACC_IMMED 0
#define ACC_DEFER 1

#define SDF_WILD        1	/* Wild card object          */
#define SDF_PROXY       2	/* Addr eligible for proxy   */
#define SDF_UICPROXY    4	/* Use uic-based proxy       */

/* Structures */

struct dn_naddr {
	__le16 a_len;
	__u8 a_addr[DN_MAXADDL];	/* Two bytes little endian */
};

struct sockaddr_dn {
	__u16 sdn_family;
	__u8 sdn_flags;
	__u8 sdn_objnum;
	__le16 sdn_objnamel;
	__u8 sdn_objname[DN_MAXOBJL];
	struct dn_naddr sdn_add;
};
#define sdn_nodeaddrl   sdn_add.a_len	/* Node address length  */
#define sdn_nodeaddr    sdn_add.a_addr	/* Node address         */

/*
 * DECnet set/get DSO_CONDATA, DSO_DISDATA (optional data) structure
 */
struct optdata_dn {
	__le16 opt_status;	/* Extended status return */
#define opt_sts opt_status
	__le16 opt_optl;	/* Length of user data    */
	__u8 opt_data[16];	/* User data              */
};

struct accessdata_dn {
	__u8 acc_accl;
	__u8 acc_acc[DN_MAXACCL];
	__u8 acc_passl;
	__u8 acc_pass[DN_MAXACCL];
	__u8 acc_userl;
	__u8 acc_user[DN_MAXACCL];
};

/*
 * DECnet logical link information structure
 */
struct linkinfo_dn {
	__u16 idn_segsize;	/* Segment size for link */
	__u8 idn_linkstate;	/* Logical link state    */
};

/*
 * Ethernet address format (for DECnet)
 */
union etheraddress {
	__u8 dne_addr[6];	/* Full ethernet address */
	struct {
		__u8 dne_hiord[4];	/* DECnet HIORD prefix   */
		__u8 dne_nodeaddr[2];	/* DECnet node address   */
	} dne_remote;
};

/*
 * DECnet physical socket address format
 */
struct dn_addr {
	__le16 dna_family;	/* AF_DECnet               */
	union etheraddress dna_netaddr;	/* DECnet ethernet address */
};

#define DECNET_IOCTL_BASE 0x89	/* PROTOPRIVATE range */

#define SIOCSNETADDR  _IOW(DECNET_IOCTL_BASE, 0xe0, struct dn_naddr)
#define SIOCGNETADDR  _IOR(DECNET_IOCTL_BASE, 0xe1, struct dn_naddr)
#define OSIOCSNETADDR _IOW(DECNET_IOCTL_BASE, 0xe0, int)
#define OSIOCGNETADDR _IOR(DECNET_IOCTL_BASE, 0xe1, int)

#endif /* _LINUX_DN_H */
